Effects of mixing graminicide herbicides and liquid fertilizer on dry matter production and yield of wheat

To examine the effect of mixing graminicide herbicides with liquid fertilizer in Gorgan region, an experiment was conducted as factorial arranged in Complete Randomized Block Design [RCBD] with three replications at the research farm of Islamic Azad University of Gorgan. The first factor was using Topic, Pumasuper and Axial herbicides with the amounts of 0.8, 1, and 0.5 l/ha-1, respectively. The second was the amounts of 0.75, 1.5, and 3 kg/ha-1 complete fertilizer. No herbicide or fertilizer treatments were also considered for factors. The effect of treatments on wheat was determined by measuring the dry matter production in 15 days intervals. Yield and its components of wheat have also determined at plant maturity. Adding complete fertilizer to the herbicides, significantly increased wheat dry matter production. the interactive effect of RGR levels, decreasing complete fertilizers and used herbicides on the number of ears were significant. Wheat yield was 267, 265 and 229 g.m-2 in Topic, Pormasuper and Axial [alone] treatments. Combining higher level of fertilizer with Topic, Pormasuper and Axial herbicides, increased wheat yield about 13, 6 and 14 %, respectively.